Changes in Matter and Law of conservation

What does the Law of Conservation of Matter state?

• atoms can be created or destroyed

• molecules can not be created or destroyed

• atoms can not be created or destroyed

• molecules can be created or destroyed

Tags

NGSS.MS-PS1-5

The law of Conservation of Energy states ..

• Energy can created or destroyed but not transformed

• Energy cannot be created or destroyed, it can only transformed

• Energy can't be created, destroyed or transformed

Tags

NGSS.MS-PS3-5

What is the scientific meaning of energy?

• anything that has mass

• the ability to cause change

• anything that cannot be seen

• the property of something to take up space

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A scientist mixes 25 grams of Reactants, how many grams of products should I have (in a closed system)?

• 25g

• 50g

• 10g

• 15g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How does the total amount of matter before a chemical reaction compare to the total amount of matter after the reaction?

• The amount of matter is greater before the reaction.

• The amount of matter is greater after the reaction

• The amount of matter before and after the reaction is the same.

• There is no relationship between the amount of matter before and after the reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a physical change?

• rusting metal

• boiling water

• leaves changing color

• bubbling of an antacid tablet in water

Tags

NGSS.MS-PS1-4

What type of reaction absorbs thermal energy?

• exothermic

• endothermic

Tags

NGSS.MS-PS1-6

If you heat a substance in a test tube and it starts as green and after heating is black, you have observed a ____________

• Chemical change

• Physical Change

• Psychological change

• Physical Property

Tags

NGSS.MS-PS1-2

Thermal energy (heat) always moves from a (1)_______ substance to a (2)_______ substance.

• (1) hot

  (2) cold

• (1) cold

  (2) hot

• (1) red

  (2) blue

• (1) blue

  (2) red

What device do we use to measure temperature?

• Microscope

• Ruler

• Speedometer

• Thermometer